** Shares of charter operator Alliance Aviation Services Ltd
AQZ.AX slip as much as 6.8% to A$3.310, on track for their
biggest single-day pct loss since Jan. 27
** Share moves reflect Australia's competition regulator's
opposition to Qantas Airways' QAN.AX proposed purchase of the
remainder of AQZ for A$610.8 mln ($423.96 mln) urn:newsml:reuters.com:*:nL1N2ZT2I1
** Regulator says the proposed acquisition raised concerns
around the possibility of lessened competition for domestic air
transport services
** Stock hits lowest since Feb. 4
** More than 351.1 mln shares change hands as compared with
the 30-day average volume of ~191.4 mln shares
** AQZ down 13.4% this year as of last close, vs 4.3%
decrease in the benchmark S&P/ASX 200 index .AXJO
($1 = 1.4407 Australian dollars)
(Reporting by Roushni Nair in Bengaluru)
((Roushni.Nair@thomsonreuters.com;))